Object-oriented filesystem paths

https://pypi.org/project/pathlib2/

Utility library for pattern matching of file paths

https://pypi.org/project/pathspec/

Python Build Reasonableness

https://github.com/openstack-dev/pbr

Pure-Python PDF toolkit

http://pybrary.net/pyPdf/

Pure-Python PDF toolkit

https://mstamy2.github.io/PyPDF2/

Pure Python Expect-like module

https://pexpect.readthedocs.io/

Pure-Python Interface to the PostgreSQL Database

https://github.com/tlocke/pg8000

Fork of the Python Imaging Library (PIL)

https://python-pillow.org/

Tool for installing and managing Python packages

https://pip.pypa.io/en/latest/

Importable pip API

https://github.com/di/pip-api

Interface Python with pkg-config

https://pypi.org/project/pkgconfig/

Query metadatdata from sdists / bdists / installed packages

https://pypi.org/project/pkginfo/

Plugin and hook calling mechanisms for Python

https://github.com/pytest-dev/pluggy

Python Lex-Yacc

http://www.dabeaz.com/ply/

Python PNG encoder/decoder

https://github.com/drj11/pypng

Collection of helpful Python tools

https://pypi.org/project/pockets/

Python library to parse and manage gettext catalogs

https://bitbucket.org/izi/polib/

Band-oriented PDF report generation from database query

http://newcenturycomputers.net/projects/pollyreports.html

TLS client policy for Postfix according to domain MTA-STS policy

https://pypi.python.org/pypi/postfix-mta-sts-resolver

Python 3 compatible PostgreSQL database driver and tools

http://python.projects.postgresql.org/

Turns CSS blocks into style attributes

https://github.com/peterbe/premailer

ReportLab's templating system

http://preppy.readthedocs.org/en/latest/

Library for stubbing in Python

https://github.com/alex/pretend

Pure-Python implementation of the HTTP/2 priority tree

https://github.com/python-hyper/priority

Google protobuf Python Client Library

https://github.com/protocolbuffers/protobuf

Python wrapper for Adobe PostScript autohinter

https://github.com/adobe-type-tools/psautohint

Process utilities module for Python

https://pypi.org/project/psutil/

High performance Python adapter for PostgreSQL

http://initd.org/psycopg/

Run a subprocess in a pseudo terminal

https://github.com/pexpect/ptyprocess

Library with cross-python path, ini-parsing, io, code, log facilities

https://pylib.org/

Universal Binary JSON encoder/decoder

https://github.com/Iotic-Labs/py-ubjson

Python 3 DNS library

https://pypi.org/project/py3dns/

ASN.1 toolkit for Python

http://snmplabs.com/pyasn1/

Collection of ASN.1 data structures for py-pyasn1

https://github.com/etingof/pyasn1-modules

Python interface to c-ares

https://pypi.org/project/pycares/

Library for making charts with Python

https://bitbucket.org/lgs/pycha

GTK chess client written in Python

http://www.pychess.org/

Python ClamD interface module

https://xael.org/pages/pyclamd-en.html

Cython wrapper for the C++ translation of Clipper library

https://github.com/greginvm/pyclipper

Python package for code generation

https://github.com/bjodah/pycodeexport

Python style guide checker

https://pypi.org/project/pycodestyle/

Utilities for Bitcoin and altcoin addresses/transaction manipulation

https://github.com/richardkiss/pycoin

Package for compilation (meta programming)

https://github.com/bjodah/pycompilation

C parser in Python

https://github.com/eliben/pycparser

Python Cryptography Toolkit

https://pycrypto.org

Cryptographic library for Python

https://www.pycryptodome.org/en/latest/

CUPS bindings for Python

https://github.com/zdohnal/pycups

Python interface to libcurl

http://pycurl.io/

Passive checker of Python programs

https://github.com/PyCQA/pyflakes

Python FTP server library

https://github.com/giampaolo/pyftpdlib